Global climate change has already had observable effects on the environment. Glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plant and animal ranges have shifted and trees are flowering sooner.
Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves.
Taken as a whole, the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.- Intergovernmental Panel on Climate Change
Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to greenhouse gases produced by human activities. The Intergovernmental Panel on Climate Change (IPCC), which includes more than 1,300 scientists from the United States and other countries, forecasts a temperature rise of 2.5 to 10 degrees Fahrenheit over the next century.
According to the IPCC, the extent of climate change effects on individual regions will vary over time and with the ability of different societal and environmental systems to mitigate or adapt to change.
The IPCC predicts that increases in global mean temperature of less than 1.8 to 5.4 degrees Fahrenheit (1 to 3 degrees Celsius) above 1990 levels will produce beneficial impacts in some regions and harmful ones in others. Net annual costs will increase over time as global temperatures increase.
"Taken as a whole," the IPCC states, "the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time." 1
Some of the long-term effects of global climate change in the United States are as follows, according to the Third National Climate Assessment Report:
Change will continue through this century and beyond
Global climate is projected to continue to change over this century and beyond. The magnitude of climate change beyond the next few decades depends primarily on the amount of heat-trapping gases emitted globally, and how sensitive the Earth’s climate is to those emissions.
Temperatures will continue to rise
Because human-induced warming is superimposed on a naturally varying climate, the temperature rise has not been, and will not be, uniform or smooth across the country or over time.
Frost-free season (and growing season) will lengthen
The length of the frost-free season (and the corresponding growing season) has been increasing nationally since the 1980s, with the largest increases occurring in the western United States, affecting ecosystems and agriculture. Across the United States, the growing season is projected to continue to lengthen.
In a future in which heat-trapping gas emissions continue to grow, increases of a month or more in the lengths of the frost-free and growing seasons are projected across most of the U.S. by the end of the century, with slightly smaller increases in the northern Great Plains. The largest increases in the frost-free season (more than eight weeks) are projected for the western U.S., particularly in high elevation and coastal areas. The increases will be considerably smaller if heat-trapping gas emissions are reduced.
Changes in precipitation patterns
Average U.S. precipitation has increased since 1900, but some areas have had increases greater than the national average, and some areas have had decreases. More winter and spring precipitation is projected for the northern United States, and less for the Southwest, over this century.
Projections of future climate over the U.S. suggest that the recent trend towards increased heavy precipitation events will continue. This trend is projected to occur even in regions where total precipitation is expected to decrease, such as the Southwest.
NASA visualizations of future precipitation scenarios
These NASA visualizations show model projections of the precipitation changes from 2000 to 2100 as a percentage difference between the 30-year precipitation averages and the 1970-1999 average.
Precipitation Measurement Missions
The official website for NASA's fleet of Earth science missions that study rainfall and other types precipitation around the globe.
Earth’s water is stored in ice and snow, lakes and rivers, the atmosphere and the oceans. How much do you know about Earth's water cycle and the crucial role it plays in our climate?
More droughts and heat waves
Droughts in the Southwest and heat waves (periods of abnormally hot weather lasting days to weeks) everywhere are projected to become more intense, and cold waves less intense everywhere.
Summer temperatures are projected to continue rising, and a reduction of soil moisture, which exacerbates heat waves, is projected for much of the western and central U.S. in summer. By the end of this century, what have been once-in-20-year extreme heat days (one-day events) are projected to occur every two or three years over most of the nation.
Hurricanes will become stronger and more intense
The intensity, frequency and duration of North Atlantic hurricanes, as well as the frequency of the strongest (Category 4 and 5) hurricanes, have all increased since the early 1980s. The relative contributions of human and natural causes to these increases are still uncertain. Hurricane-associated storm intensity and rainfall rates are projected to increase as the climate continues to warm.
Sea level will rise 1-4 feet by 2100
Global sea level has risen by about 8 inches since reliable record keeping began in 1880. It is projected to rise another 1 to 4 feet by 2100. This is the result of added water from melting land ice and the expansion of seawater as it warms.
In the next several decades, storm surges and high tides could combine with sea level rise and land subsidence to further increase flooding in many regions. Sea level rise will continue past 2100 because the oceans take a very long time to respond to warmer conditions at the Earth’s surface. Ocean waters will therefore continue to warm and sea level will continue to rise for many centuries at rates equal to or higher than those of the current century.
Arctic likely to become ice-free
The Arctic Ocean is expected to become essentially ice free in summer before mid-century.
Earth’s vital signs: Sea ice
An indicator of changes in the Arctic sea ice minimum over time. Arctic sea ice extent both affects and is affected by global climate change.
Global Ice Viewer
An interactive exploration of how global warming is affecting sea ice, glaciers and continental ice sheets worldwide.
U.S. regional effects
Below are some of the impacts that are currently visible throughout the U.S. and will continue to affect these regions, according to the Third National Climate Assessment Report2, released by the U.S. Global Change Research Program:
Northeast. Heat waves, heavy downpours and sea level rise pose growing challenges to many aspects of life in the Northeast. Infrastructure, agriculture, fisheries and ecosystems will be increasingly compromised. Many states and cities are beginning to incorporate climate change into their planning.
Northwest. Changes in the timing of streamflow reduce water supplies for competing demands. Sea level rise, erosion, inundation, risks to infrastructure and increasing ocean acidity pose major threats. Increasing wildfire, insect outbreaks and tree diseases are causing widespread tree die-off.
Southeast. Sea level rise poses widespread and continuing threats to the region’s economy and environment. Extreme heat will affect health, energy, agriculture and more. Decreased water availability will have economic and environmental impacts.
Midwest. Extreme heat, heavy downpours and flooding will affect infrastructure, health, agriculture, forestry, transportation, air and water quality, and more. Climate change will also exacerbate a range of risks to the Great Lakes.
Southwest. Increased heat, drought and insect outbreaks, all linked to climate change, have increased wildfires. Declining water supplies, reduced agricultural yields, health impacts in cities due to heat, and flooding and erosion in coastal areas are additional concerns.
Global warming is an issue that has in the recent times continued to attract a lot of attention from many people from many countries and make the topic a matter of debate. It comes as no surprise that this issue is the subject of many of the assignments that students are assigned to write. When asked to write an essay on global warming, do not worry about writing an essay that will stand out and have the best grades, because with our essay writing service you can find more than enough help needed to get good grades in any essays on global warming assignments that you will be asked to complete.
You are probably wondering why the academia industry is taking the issue about global warming so seriously and asking so many students to write essays on global warming. The answer to this lies in the fact that the atmospheric temperature of the earth has been steadily rising and with this comes numerous, mostly negative, effects for the inhabitants of the earth. People all over the globe are gradually expressing their anxiety and have even taken a number of initiatives to fight this problem that affects the whole globe.
The writing of essays on global warming is one way the academic field can fight this problem, because through these essays, many people get to know what global warming is, and also know how to fight or provide solutions to it. Given that global warming is a very wide subject, it is important to know how to select essay topics on this issue that one can use to write a well rounded essay without forgetting an issue or any important point.
Let Us Write Your Essays on Global Warming
It sounds like an easy thing to find topics related to global warming that one could write an essay on, but if you experience any difficulties with this task, please contact the professional writers here who will help you select the most appropriate global warming essay topic.
Normally, students like to select topics that they are very familiar with because it will be very easy to write a global warming essay on such, but there are those situations when the professor selects the topic beforehand and gives the students these topics. Now, things can get very complicated when the teacher selects a topic on global warming that you either do not like, or are not at all familiar with. When faced with this situation, the best decision that you can make is to let the expert writers to complete that global warming essay instead of struggling with it when you are not sure if you are capable of doing it correctly or you have little free time to do it. Our professional writers are able to write on any topic you give them and find the relevant sources that will enable them to tackle the topic and to write the essay in an excellent way.